ENER-WIN logo.

Energy design tool for large commercial buildings. Performs whole-building energy analysis for 8760 hours/year for up to 98 zones and 20 different wall and window types. Calculates transient heat flows, HVAC loads, daylighting, energy consumption, demand charges, life-cycle costs, and floating temperatures in unconditioned zones. Input is through a sketching interface. Weather data from included database of 1500 cities. Graphical output is in form of bar charts and graphs. Tabulates peak zone loads and air quantities. Screen Shots


energy performance, load calculation, energy simulation, commercial buildings, daylighting, life-cycle cost


Soebarto, Veronica I. 1997, �Calibration of hourly energy simulations using hourly monitored data and monthly utility records for two case study buildings�, Proc. Building Simulation �97, Vol. II, Int�l. Bldg. Perf. Simulation Ass�n (IBPSA) Conf. held in Prague, the Czech Republic, pp 411-419, 8-10 Sept 1997

Expertise Required

Experience with Windows applications. Knowledge of building thermal properties and energy concepts.


Estimated to be in the low hundreds at schools of architecture in Greece, Mexico, Thailand, and the U.S., as well as several dozen practitioners in the U.S., Canada, Kuwait, Mexico and Europe.


Architects, engineers, energy analysts, building inspectors, and students of architecture and engineering.


Graphic entry of building plans through a sketch interface, building envelope thermal properties, hourly use profiles, hourly indoor temperature settings.


Tabular reports and graphs available for monthly loads, annual loads and energy, peak loads, electric displacement by daylighting, life-cycle costs, and weather summaries.

Computer Platform

PC-compatible, MS Windows (All versions), 64 Mbytes RAM, 30 Mbytes of available hard drive. Screen resolution 1024x768 minimum.

Programming Language

Visual Basic and FORTRAN.


Graphic sketch input interface, hourly weather data generator with 1500-city worldwide database. Can run in compacted weather data mode for quick testing of alternative design strategies. Generous use of defaults for materials, windows, profiles, costs, lights, etc.


Uses simplified system simulation algorithms. Nine HVAC systems available. Not recommended for testing differences in HVAC systems.



Degelman Engineering Group, Inc.


2206 Quail Run
College Station, Texas 77845
United States


+1 (979) 696-2506


+1 (979) 696-2506






Registered license: $249 for version EC, $29.95 for version 2002. or version 97.2000 is available for free. Order from contact person listed above. All versions have 45-day free trial period from the web site. Request free password for version 97.2000.